Ans:- The process by which plants make their own food in the presence of Sunlight,carbon dioxide present in air,water,mineral and chlorophyll present in leaves is termed as photosynthesis.

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of organic compounds like glucose. This process is important for the survival of these organisms and for the maintenance of the balance of the earth's atmosphere.

Light Reaction

In the first stage of photosynthesis, also known as the light reaction, plants absorb light energy from the sun with the help of pigments like chlorophyll and carotenoids. This energy is then converted into chemical energy, which is stored in the form of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).

Dark Reaction

In the second stage of photosynthesis, also known as the dark reaction, or the Calvin cycle, plants use the ATP and NADPH from the light reaction to synthesize glucose and other organic compounds from carbon dioxide and water.

Stomata

During photosynthesis, plants take in carbon dioxide from the air through small pores on their leaves called stomata. At the same time, they release oxygen into the air. This process helps to maintain the balance of gases in the earth's atmosphere.

Importance of Photosynthesis

Photosynthesis is important for the survival of green plants, algae, and some bacteria, as it supplies them with the energy they need to carry out their life processes. In addition, photosynthesis plays a crucial role in the carbon cycle, helping to regulate the levels of carbon dioxide in the atmosphere. Without photosynthesis, life on earth as we know it would be impossible.

In conclusion, photosynthesis is a complex process that involves the conversion of light energy into chemical energy. This process is crucial for the survival of green plants, algae, and some bacteria, and for the maintenance of the balance of the earth's atmosphere.